Africa’s population is expanding at rates never seen before. Between now and 2050 it is predicted to double. Most of that growth—80 percent—will occur in urban areas. In the past decade alone, technology—especially mobile phones—has transformed the way Africans communicate and do business. Politics is also changing rapidly. Multiparty elections and popular support for democracy are the norm, even though the record across the continent is uneven and numerous countries have reversed course in recent years.